TEXTILES
& WATER - the
worlds most damaging contaminant

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Water is not
only the worlds most damaging contaminant, but it
can make life very uncomfortable if water vapour seeps
through a textile!

Versaperm Limited, a world technology leader, has
launched a new instrument that can measure the water
vapour permeability of anything from a sports jacket
through to a textile medical protection cover, or from
rubber and PUR-foils through to the gas permeability of a
tissue.

The new WVTR (Water Vapour Transmission Rate) meter is
versatile, fast, reliable, gives highly reproducible
results and can be used to test virtually all packaging
types. It allows the temperature and humidity of the
sample to be accurately controlled. As well as the
selling the instrument, the company offers a
comprehensive laboratory-based permeability testing
service.

The MK VI meters highly automated computerised
control can cope with several samples at a time - and
still give a reading in as little as 30 minutes for some
materials. The conventionally gravimetric measurement
technique takes several days and gives significantly less
accurate and reproducible results.

The instrument needs, at most, minimal re-calibration and
is extremely simple to use, but gives results that can be
accurate to better than one part per million (with some
samples a few parts per hundred million). Sensitivities
are typically in the range 0.05 - 3200g/m2/day.

A wide
variety of options is available, depending on the
specific applications, either single or multi-sample
systems, plus a range of measurement chambers and sensors
can be supplied for testing samples from the size of a
thimble up to a pallet load and beyond.